JsonMapObjectReaderWriter not escaping the characters like \n properly

[juniiorviani]

Issue ref: https://issues.apache.org/jira/browse/CXF-8651

The JWS is generate with an invalid payload if I try to set a claim like this:

JwtClaims claims = new JwtClaims();

String claim = "GET\n\n\nWed, 19 Jan 2022 15:25:29 GMT\n/test/16c8a1ec-8d75-47a1-b138-46746713b8d8";
claims.setClaim("test", claim);

JwsCompactProducer jwsProducer = new JwsJwtCompactProducer(claims);

The JWS payload result will be: eyJ0ZXN0IjoiR0VUCgoKV2VkLCAxOSBKYW4gMjAyMiAxNToyNToyOSBHTVQKL3Rlc3QvMTZjOGExZWMtOGQ3NS00N2ExLWIxMzgtNDY3NDY3MTNiOGQ4In0

And when I decode the result is:
"{"test":"GET\n\n\nWed, 19 Jan 2022 15:25:29 GMT\n/test/16c8a1ec-8d75-47a1-b138-46746713b8d8"}"

This is an invalid payload because the json is stringify.. the json should be:

{ "test" : "GET\n\n\nWed, 19 Jan 2022 15:25:29 GMT\n/test/16c8a1ec-8d75-47a1-b138-46746713b8d8" }

[amarkevich]

@juniiorviani could you add a unit test for this case?

[juniiorviani]

Sure thing, @amarkevich I just added the unit tests

[coheigea]

The tests are failing in this module, and checkstyle as well:

[ERROR] Failures:
[ERROR] JsonMapObjectReaderWriterTest.testAlreadyEscapedBackslash:210 expected:<a[]> but was:<a[]>
[ERROR] JsonMapObjectReaderWriterTest.testAlreadyEscapedDoubleQuotes:174